Valve-reseating tool



July 27 1926.

c. P. DRESSEL VALVE RESEATINGITOOL Filed Dec. 11 1925 Patented July 27, 1926.

UNITED STE a'rnnr CHARLES P. DRESSEL, F TULSA, OKLAHOMA.

VALVE-RESEATING TOOL.

Application filed December 11, 1925.

This invention relates to tools adapted for use by automobile mechanics and others in the repairing of the engines of automobiles, pumps, compressors or in fact any other devices employing valves, and has for its object the provision of a novel device by means of which engine or other machine valves may be caused to seat properly, the device being for the purpose of grinding or cutting the valve seat in order to insure a proper and perfect An important object is the provision of a valve reseating tool embodying a guide stem and a body member carrying cutters or grinders, preferably the former, a handle means being connected with the body whereby rotary movement or oscillatory movement may be imparted thereto for attaining or obtaining the desired cutting or seating or refinishing action.

Still another object of the invention is to provide a novel clutch device interposed between the operating handle and the oscillatory or rotatable body of the device, the clutch device being automatic in its action and of a ratchet-like nature so that it will take hold when the handle is moved in one direction but released when the handle is moved in the other direction.

The invention further contemplates the provision of a device of this character embodying various details of construction and arrangement which will constitute a distinct improvement in the art, in point of simplicity and cheapness in manufacture, ease of operation, eiiiciency in action and durability in service.

With the above and other objects and ad vantages in view, the invention consists in the details of construction, and the arrangement and combination of parts to be hereinafter more fully described and claimed, and illustrated in the accompanying drawing, in which Figure 1 is a side elevation of the complete device showing it working upon a valve seat, a portion of an engine, compressor or the like having a valve seat being shown in section.

Figure 2 is a horizontal section taken on the line 22 of Figure 1.

Figure 3 is a vertical longitudinal section through the device taken on the line 3-3 01 Figure 1.

Figure 1 is a detail section showing a different type of cutter, and

till

Serial No. 74,865.

Figure 5 is a detail perspective view of a detail element. iteierring more particularly to the drawings, the letter A designates a valve seat to be ground or resurfaced. It is immaterial whether this valve seat be in an engine, compressor, pump or other mechanical device of any kind having a valve seatwith which is intended to cooperate a suitable valve. For obvious reasons, the valve itself is not shown in the present invention, or in the drawings. It should however be stated that ordinarily there is provided some type of guide B for whatever valve stem is used. v t

In carrying out the invention, 1 provide an elongated preferably cylindrical body member 10 which may have its outer surface knuried or milled, or in fact roughened in any other desired manner to enable the operator to obtain a proper grip thereon tor liiting it- 'from time to time during the oscill'atory or rotary movement to be described. Obviously, the member 10 may be of any desired diameter and length and its lower end is provided with a threaded bore 11 within which is detachably screwed a threaded extension 12 on a stem-like guide member 13 adapted to be slidably engaged through the guide opening B forming part of the engine or compressor so that the device or body member 10 will be properly centered with respect to thevalve seat. In the present instance, the stem 13 is shown as provided with an angular portion 14: adapted to be engaged by a wrench or other tool, whereby the necessary turning action may be accomplished for screwing the' threaded extension 12 into the bore 11. T he body member 10 is formed with a longitudinal bore 15 communicating with the bore 11, and located within this bore 15 is the shank 16 oi? a holder 17 for a cutting tool 18. In the present instance, this holder 17 is shown as located within the bore or recess 11 and it is iormed with a transverse opening 19 through which the cutter 18 extends, the opposits sides or diametrically opposite portions Of the body member 10 being formed with slots 20 through which the cutter 18 extends, it being quite obvious that if the shank 16 be drawn upwardly the holder 1? binding against the lower surface of the cut ter 18 will act to lock it firmly in position so that it cannot become accidentally displaced.

At a point near itsupper end, the body member 10 is formed with a reduced or neck portion 21 beyond which projects the stem 16, this projecting end oi? the stem being threaded as indicated at 22 and carrying a clamping nut 23 formed with a threaded opening or bore into which is screwed the reduced threaded end 25 of a securing screw 26 which passes through a binding or clamping nut 27. The nut members 23 and 27 are preferably milled or knurled or in fact roughened in any other manner in order that the operator may obtain a proper grip thereon.

It is of course intended that when the body member 10 is equipped with the transversely arranged cutting member 18, the ends of which must of course be beveled or otherwise formed to correspond to the proper surface or the valve seat to be treated, I provide operating means comprising an elongated arm or lever 28 carrying a handle 29. This lever 28 terminates in a ring-like head 30 which is disposed between a pair of collars or ring-like members 31 and 32 engaged upon the neck portion 21 of the body and secured against separation by any desired means such, for instance, as screws 33.

The ring or disk member 31 is provided with a vertical flange 3r keyed or otherwise suitably secured to the neck or constricted portion 21 and the key 35 acts also to hold in place a disk 36 which is located between the members 31 and 32 and which is provided *ith angular cutout port-ions 37 within which are mounted rollers 38 engaged by outwardly spring pressed plungers 39 slidable within sockets 40 in the disk. This peculiar and particular construction constitutes a species of ratchet clutch as will be apparent and it will be seen that when the handle member or arm 28 is moved in one direction the rollers 38 engaging against the inclined walls 41 of the recesses or cutout portions 37 will be forced into engagement with the inner periphery of the ring-like head 30 so as to constitute a locking or drive connection which will result, naturally, in rotation of the body member 10 and consequently the cutter 18 carried thereby.

In the operation it is'intended that the operator insert the stem 13 through the guide B and allow the body member 10 to drop down to such a pointthat the cutter 18 will engage against the valve seat A to be dressed or out. By grasping the knurled or milled body member 10 in one hand and urging it downwardly to bring the cutter 18 into firm engagement with the seat it will be seen that when the handle 29 is grasped and the arm or lever 28 moved in one direction the body member 10 and consequently the cutter 18 carried thereby will be rotated so as to exert a cutting action upon the valve seat. Upon the reverse movement of the lever or arm 28 1t 1s quite apparent that the clutch mechanism comprised by the part located between the members 31 and 32 will become idle and it is therefore merely necessary to reciprocate or oscillate the handle member 28 back and forth in order to impart a proper continuous or semi-continuous rotary movement to the cutter 18. From time to time, if it is desired, for any reason, the operator may pull upwardly upon the body 10 to disengage the cutters 18 from the valve seat in order to permit them to get a new bite thereon and obtain 'a proper cutting action.

In Figure 4: I have illustrated a slight modification in which I have disclosed a cutter head 4-1-2 ha yin g a reduced threaded extension 13 adapted to be screwed into the bore or recess 11 in place of the stem 13 or rather the threaded extension 12 of the stem. This cutter head 12 may be constructed in substantially the same manner as a reamer and it is provided at its under or lower side with a threaded recess or socket 44 within which may be screwed the threaded extension 12 of the stem 13 which must of course be used as a guide.

In Figure 5 there is illustrated still another slight modification in which I have disclosed a chuck device 45 having an angular socket 16 thereon adapted to receive a suitable guide element or rod having an angular end, this member 45 having a reduced threaded extension 17 adapted to be screwed into the bore or recess 11. This type of device is used when there is no guide such as the guide B for a stem which might be provided for the body member.

From the foregoing description and a study of the drawings, it will be apparent that I have thus provided a simply constructed, comparatively inexpensive and 6X* tremely easily operated device by means of which valve seats may be dressed or cut in order to provide an accurate bite for the valves cooperating therewith. It is really believed that the construction, operation and advantages will be readily apparent to one skilled in the art without further explanation.

While I have shown and described the preferred embodiment of the invention, it should be understood that I reserve the right to make such changes in the form, construction and arrangement of parts as will not depart from the spirit or" the invention or the scope of the subjoined claims.

Having thus described the invention, I claim 1. A valve reseating tool comprising an elongated body member provided with diametrically arranged slots, said body member being formed with a longitudinal bore extending throughout the major portion thereof and being provided at one end with a recess communicating with said bore, said recess being threaded, a guide stem having a threaded extension detachably engaged within the threaded end portion of said recess, a stem slidably mounted within said bore and terminating in a cutter holder at one end and having a threaded portion at the other end, a cutter disposed transversely of the body through the slots therein and through the holder, and a nut member engaged upon the threaded end of the second named stem for drawing said holder into clamping engagement with the cutter.

2. A valve reseating tool comprising an elongated body member provided with diametrically arranged slots, said body member being formed with a longitudinal bore extending throughout the major portion thereof and being provided at one end with a recess communicating with said bore, said recess being threaded, a guide stem having a threaded extension detachably engaged within the threaded end portion of said recess, a stem slidably mounted within said bore and terminating in a cutter holder at one end and having a threaded portion at the other end, a cutter disposed transversely of the body through the slots therein and through the holder, and a nut member engaged upon the threaded end of said second named stem for drawing said holder into clamping engagement with the cutter, and a ratchet arm engaged upon the body member and equipped with an operating handle whereby the body member may be oscillated for rotating.

3. A valve reseating tool comprising an elongated body member provided with diametrically arranged slots, said body member being formed with a longitudinal bore extending through the major portion thereof and being provided at one end with a recess communicating with said bore, said recess being threaded, a guide stem having a threaded extension detachably engaged within the threaded end portion of said recess, a stem slidably mounted within said bore and terminating in a cutter holder at one end and having a threaded portion at the other end, a cutter disposed transversely 01" the body through the slots therein and through the holder, and a nut member engaged upon the threaded end of said second named stem for drawing said holder into clamping engagement with the cutter, and a ratchet arm engaged upon the body member and equipped with an operating handle whereby the body member may be oscillated for rotating, said operating arm havinga head of ring-like formation, upper and lower guide ring or disk members carried by the body, a disk secured with respect to one of said guide members and formed with cutout portions having inclined walls, and rollers movably mounted along the cutout portions and spring pressed in one direction whereby to bite against the inner periphery of the ring-like head to provide a drive connection when the lever arm is moved in one direction and to automatically release upon movement thereof in the opposite direction.

In testimony whereof I aflix my signature.

CHARLES P. DRESSEL. 

